مسند أحمد

It was narrated that Hujayyah said: A man asked “Ali (رضي الله عنه) about (sacrificing) a cow. He said: (it may be sacrificed) on behalf of seven people. He said: (What about a cow with) a broken horn? He said. It doesn`t matter. He said: (What if it is) lame? He said: If it can reach the place of sacrifice, then slaughter it. The Messenger of Allah (ﷺ) commanded us to examine the eyes and ears.